Question

I want to let the user add buttons So that each row are only four buttons. so I wrote the following function:

private void addContact() {
        //numButton Count how many buttons there are in line
        if(numButton==0){
            LinearLayout linearLayout =new LinearLayout(this);
            linearLayout.setOrientation(0);//horizontal
            ImageButton imageButton =new ImageButton(this);
            imageButton.setImageBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.button1));
            linearLayout.addView(imageButton);
            LinearLayout linearbase= (LinearLayout)findViewById(R.id.linearBase);
            linearbase.addView(linearLayout);
            numButton++;
        }
        else if(numButton<4)
        {
            LinearLayout linearlayout= ----####Here I do not know what to write!!!!###
            ImageButton imageButton =new ImageButton(this);
            imageButton.setImageBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.button1));
            linearlayout.addView(imageButton);
            numButton++;
        }
        else 
        {
            numButton=0;
        }
    }

I marked the lines of code my problem Specifically my problem is how to put the new button into the linearlayout that defined in the previous call to this function? Second question: how to keep the new situation even when you close the application?

Answer 1

当你首次制造线索时,给它以补偿。然后,你可以第二次找到ById()。为回答您的第二个问题,在。

Answer 2

声明在您的添加方法之外,或只在这种方法内存在。我想,就象这一那样做工作(我没有经过测试):

class myclass{

    private LinearLayout linearLayout;
    private LinearLayout linearbase;
    private int numButton;

    @Override
    public void onFinishInflate() {
        super.onFinishInflate();

        linearbase= (LinearLayout)findViewById(R.id.linearBase);
        LinearLayout linearLayout =new LinearLayout(this);
        linearLayout.setOrientation(0);//horizontal

        numButton=0;
    }

    private void addContact() {
        //numButton Count how many buttons there are in line
        if(numButton==0){

            ImageButton imageButton =new ImageButton(this);
            imageButton.setImageBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.button1));
            linearLayout.addView(imageButton);
            linearbase.addView(linearLayout);
            numButton++;
        }
        else if(numButton<4)
        {
            linearLayout= new LinearLayout(this);
            ImageButton imageButton =new ImageButton(this);
            imageButton.setImageBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.button1));
            linearlayout.addView(imageButton);
            numButton++;
        }
        else 
        {
            numButton=0;
        }
    }   
}

友情链接